Introduction of PC18MR-2 - Komatsu

greatly reduces user inconvenience.
The floor tilting up structure has been adopted to make field
maintenance and repair servicing easier and to reduce man
hour and cost in servicing for maintenance and repairs (Photo
3).
The exhaust gas specification meets the tier-2 exhaust gas
regulations of U.S.A., Europe and Japan.
2) Safety of operation system
All the actuators are adopted with PPC control to lock all
actuators by operating the lock lever.
The engine can be started only when the lock lever is locked.
3) Exterior machine covers
The side deck is made of a casting that is integral to the
revolving frame to resist damage when a shock is applied.
All the exterior machine covers are made of metal plates to
greatly enhance repairability.
Only the engine hood can be opened and closed on the
conventional machine. The new model allows opening and
closing of both left and right side covers also.
4) 500 hours between maintenance services
The interval between periodical maintenance servicing has
been lengthened to 500 hours, to save on maintenance
servicing time for the customers.
5) Less loosening of pin play of work equipment
The pin diameter of the boom swinging part, which is
subjected most to rugged work and large load, has been
increased (Fig. 7).
Photo 3 Floor tilted up
This structure makes it easier for maintenance servicing and
part replacement, which have been troublesome in the
conventional machines, of heavy components such as the
engine, swing motor and swivel joint. It also allows visual
checks of piping and wiring to enhance their reliability.
The floor tilting up structure offers the following features.
• Tilting fulcrum placed in front part of floor
(By adopting a rubber bushing, floor vibration is
reduced.)
• A combination of a gas spring and torsion bar makes the
operating force constant.
A double lock is adopted for locking of the floor tilting up
function to ensure operator safety (Fig. 6).
• Automatic locking mechanism
• Locking by pin plugging
Automatic lock
Fig. 7
4. Conclusion
Pin diameters
PC18MR-2:55mm
PC15MR-1:50mm
Pin diameter of boom swinging part
As anticipated, the PC18MR-2 has been accepted favorably
in the overseas market, registering sales more than double that
for PC15MR-1.
More models that will be further attractive to the users will
be developed in the future to recapture in the not-too-distant
future the position of global top share holder that has been
captured by another company.
Plug pin
Fig. 6 Locking device when floor is tilted up
(4) Other features
1) Environmental friendliness
The noise specification conforms to the ultra low noise
regulation of the Japanese Land and Infrastructure Ministry.
2006 1 VOL. 52 NO.157 Introduction of PC18MR-2
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